The Ultimate Guide To CLBO Crystal
The Ultimate Guide To CLBO Crystal
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However, in an effort to system the crystal is incredibly Superior producing techniques are required. For the reason that dawn of this crystal, working on this problem, we are actually the only real organization on the planet that may be processed Within this crystal.
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As an illustration, The existing concave OC could get replaced by a plane mirror which could mitigate the facility density over the floor of M1 as well as the diamond. In addition, employing higher damage threshold coatings for M1 and diamond would also Enhance the output energy with no damages. Then, the NIR laser on the 2nd Stokes wavelength might be high adequate, and also its great beam top quality, to crank out the ultimate DUV laser at 193 nm with a high typical electrical power.
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LBO can also be a great nonlinear crystal which is always applied to the SHG in the NIR on the inexperienced. The DUV laser is frequently understood by two levels of SFG click here within the LBO crystals considering that there isn't a section-matching angle for LBO to convert the green laser at 515 nm or 532 nm to your DUV instantly by SHG [sixteen]. A short while ago, the NSBBF crystal has also revealed its potential to obtain a large conversion effectiveness from 532 nm to 266 nm. The walk-off angle and deff in the NSBBF are Nearly similar to Those people of CLBO [seventeen].
On the opposite side, the facility scaling of the NIR laser is another element to increase the average electric power in the 193-nm DUV laser. Because of the not enough the significant-energy amplification Resolution with the NIR laser (for instance at 1553 nm), nonlinear frequency processes such as optical parameter oscillation (OPO) can be applied to produce a wavelength converter by shifting the wavelength from 1 μm to the specified wavelength in addition to acquiring relative greater power [21]. Lately, a diamond Raman laser confirmed its capability in acquiring a substantial electricity plus a substantial conversion effectiveness within the 1st Stokes on the 1-μm laser [22,23], which means the chance to be utilized within the 193-nm DUV laser technology thanks to its superior Raman get and large frequency shift.
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During the scientific and industrial programs, the beam high quality of the DUV laser is likewise a vital parameter. Notably, the beam quality on the DUV laser substantially impacts the laser machining success. The beam top quality with the DUV laser is set by that of the fundamental laser and the crystal with the frequency conversion. Not too long ago, a large-electrical power DUV laser (>ten W) at 258 nm was described by using a beam quality of M2 < one.5, which was generated by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would lead to a better laser machining final result when compared to the past DUV lasers with greater M2.
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The beam profile demonstrated in Figure 7b shown an excellent beam high quality as one of the merits of Raman laser, which might be valuable to make a 193-nm DUV laser with a high quality beam.
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The event on the 193-nm laser was demonstrated by phases of SFG. To be able to scale the DUV laser energy properly, a completely new thought in the 193-nm DUV laser generation is offered determined by the diamond Raman laser.